The research methods used in this Twin case include a cross-sectional research. They performed IQ test, life history, psychiatric, and sexual life interviews. T

The research methods used in this Twin case include a cross-sectional research. They performed IQ test, life history, psychiatric, and sexual life interviews. The participants also took a questioner independently, under constant supervision. The data that was collected showed us that 70% or 2/3 of the findings in IQ could be traced back to genetic variations. Adult monozygotic twins are equally similar in physiology and psychological traits. The findings were very surprising, being raised by the same parents or in different homes doesn’t have anything to do with making siblings grow up to be alike. Like as said with Nature vs Nurture individuals choose how they react in situations, as for their thoughts, emotions, and actions. Nature and Nurture both are very influential to what makes us who we are and we need both nature and nurture equally.